[turbofan] Spill rsi and rdi in their existing locations.

src/compiler/register-allocator.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_REGISTER_ALLOCATOR_H_
 #define V8_REGISTER_ALLOCATOR_H_
 
 #include "src/compiler/instruction.h"
 #include "src/ostreams.h"
 #include "src/register-configuration.h"
@@ skipping 514 matching lines @@
   bool HasNoSpillType() const {
     return spill_type() == SpillType::kNoSpillType;
   }
   bool HasSpillOperand() const {
     return spill_type() == SpillType::kSpillOperand;
   }
   bool HasSpillRange() const { return spill_type() == SpillType::kSpillRange; }
 
   AllocatedOperand GetSpillRangeOperand() const;
 
-  void SpillAtDefinition(Zone* zone, int gap_index,
-                         InstructionOperand* operand);
+  void RecordSpillLocation(Zone* zone, int gap_index,
+                           InstructionOperand* operand);
   void SetSpillOperand(InstructionOperand* operand);
   void SetSpillStartIndex(int start) {
     spill_start_index_ = Min(start, spill_start_index_);
   }
 
-  void CommitSpillsAtDefinition(InstructionSequence* sequence,
-                                const InstructionOperand& operand,
-                                bool might_be_duplicated);
+  void CommitSpillMoves(InstructionSequence* sequence,
+                        const InstructionOperand& operand,
+                        bool might_be_duplicated);
 
   // If all the children of this range are spilled in deferred blocks, and if
   // for any non-spilled child with a use position requiring a slot, that range
   // is contained in a deferred block, mark the range as
   // IsSpilledOnlyInDeferredBlocks, so that we avoid spilling at definition,
   // and instead let the LiveRangeConnector perform the spills within the
   // deferred blocks. If so, we insert here spills for non-spilled ranges
   // with slot use positions.
   void MarkSpilledInDeferredBlock(const InstructionSequence* code);
   bool TryCommitSpillInDeferredBlock(InstructionSequence* code,
@@ skipping 14 matching lines @@
 
   int GetNextChildId() {
     return IsSplinter() ? splintered_from()->GetNextChildId()
                         : ++last_child_id_;
   }
 
   bool IsSpilledOnlyInDeferredBlocks() const {
     return spilled_in_deferred_blocks_;
   }
 
-  struct SpillAtDefinitionList;
+  struct SpillMoveInsertionList;
 
-  SpillAtDefinitionList* spills_at_definition() const {
-    return spills_at_definition_;
+  SpillMoveInsertionList* spill_move_insertion_locations() const {
+    return spill_move_insertion_locations_;
   }
   void set_last_child(LiveRange* range) { last_child_ = range; }
   LiveRange* last_child() const { return last_child_; }
   TopLevelLiveRange* splinter() const { return splinter_; }
   void SetSplinter(TopLevelLiveRange* splinter) {
     DCHECK_NULL(splinter_);
     DCHECK_NOT_NULL(splinter);
 
     splinter_ = splinter;
     splinter->relative_id_ = GetNextChildId();
     splinter->set_spill_type(spill_type());
     splinter->SetSplinteredFrom(this);
   }
 
+  void MarkHasPreassignedSlot() { has_preassigned_slot_ = true; }
+  bool has_preassigned_slot() const { return has_preassigned_slot_; }
+
  private:
   void SetSplinteredFrom(TopLevelLiveRange* splinter_parent);
 
   typedef BitField<bool, 1, 1> HasSlotUseField;
   typedef BitField<bool, 2, 1> IsPhiField;
   typedef BitField<bool, 3, 1> IsNonLoopPhiField;
   typedef BitField<SpillType, 4, 2> SpillTypeField;
 
   int vreg_;
   int last_child_id_;
   TopLevelLiveRange* splintered_from_;
   union {
     // Correct value determined by spill_type()
     InstructionOperand* spill_operand_;
     SpillRange* spill_range_;
   };
-  SpillAtDefinitionList* spills_at_definition_;
+  SpillMoveInsertionList* spill_move_insertion_locations_;
   // TODO(mtrofin): generalize spilling after definition, currently specialized
   // just for spill in a single deferred block.
   bool spilled_in_deferred_blocks_;
   int spill_start_index_;
   LiveRange* last_child_;
   UsePosition* last_pos_;
   TopLevelLiveRange* splinter_;
+  bool has_preassigned_slot_;
 
   DISALLOW_COPY_AND_ASSIGN(TopLevelLiveRange);
 };
 
 
 struct PrintableLiveRange {
   const RegisterConfiguration* register_configuration_;
   const LiveRange* range_;
 };
 
@@ skipping 486 matching lines @@
   RegisterAllocationData* const data_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveRangeConnector);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGISTER_ALLOCATOR_H_